BMW 7 Series: System Overview

Fig. 79: Rain/Lights/Solar/Condensation Sensor System Overview

COMPONENTS DESCRIPTION CHART

1. Front wiper motor with wiper
2. Outside temperature sensor
3. Heated washer jet 3x (1)
4. Headlight washer system motor
5. Washer fluid pump motor
6. Washer fluid level sensor
7. Wiper switch on the steering column stalk
8. Rain/lights/solar/condensation sensor
9. Lights operating unit
10. Dynamic stability control

LIN-Bus - Local Interconnect Network bus
JB - Junction box electronics

(1) Heated washer jets on the driver's side, in the center and on the front-passenger side

When the wiper switch on the steering column stalk (7) is operated, the wiper motor (1) is switched on or off.

The junction box electronics execute the functions of the wiper/washer system. The motor for the washer fluid pump (5) or for the headlight cleaning system (4) is switched on or off by the junction box electronics.

On vehicles with automatic driving lights control, the junction box electronics receive the information about switching the wiper/washer system on/off from the rain/lights/solar/condensation sensor (8).

The Dynamic Stability Control (10) provides information about the vehicle speed.

System Circuit Diagram for the Wiper/washer System

Fig. 80: Wiper/Washer System Circuit Diagram

COMPONENTS DESCRIPTION CHART

1. ZGM central gateway module
2. Wiper motor
3. Heated washer jet on the driver's side
4. Heated washer jet in the center of the vehicle
5. Heated washer jet on the front-passenger side
6. Outside temperature sensor
7. Washer fluid level sensor
8. Washer fluid pump motor
9. Motor, headlight washer
10. Front distribution box
11. Junction box electronics (JB)
12. Wiper switch on the steering column stalk
13. Steering column switch cluster (SZL)
14. Instrument cluster
15. Rain/lights/solar/condensation sensor
16. Roof functions center (FZD)

KI. 30 - Terminal 30
KI. 30B - Terminal 30 basic operation
K-CAN2 - Body CAN2
PT-CAN - Powertrain CAN
LIN-Bus - Local Interconnect Network bus

The signal produced when the wiper switch on the steering column stalk (12) is operated is sent from the SZL steering column switch cluster (13) via the FlexRay to the central gateway module (1). The central gateway module transmits the signal on the K-CAN2. The junction box electronics (11) switch the wiper motor (2) on, for example and monitor its function.

The washer fluid pump (8) is switched on or off by the junction box electronics.

On vehicles with automatic driving lights control, the rain/lights/solar/condensation sensor (15) sends the request to switch on the wiper motor, for instance, via the LIN bus. The junction box electronics receives the request and implements it.

The roof function center (16) supplies the voltage for the rain/lights/solar/condensation sensor.

K-CAN2 signals to the junction box electronics

K-CAN SIGNALS CHART

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